摘要:
According to one embodiment, a semiconductor memory device includes a memory and a controller. The controller controls the memory, communicates with a host device via a first signal line and a second signal line, and receives data items to be written in the memory from the host device on the first and second signal lines in a first period. The same group number is assigned to two data items which flow in parallel on the first and second signal lines. The controller transmits to the host device a response packet including an indication of a group number assigned to an unsuccessfully received one of the data items.
摘要:
According to one embodiment, a wireless communication device includes a first transmitting/receiving unit, a first physical processor, and a first MAC processor. The first transmitting/receiving unit transmits one first wireless signal and receives a second wireless signal by a first wireless communication method using a frequency band with a certain bandwidth. The first physical processor decodes the second wireless signal to obtain a frame and encodes a frame of the first wireless signal to be transmitted. The first MAC processor supplies a control frame generated by embedding a first frame to a MAC header of a second frame to the physical processor as the frame. The first frame is recognizable by the first wireless communication method and a second wireless communication method. The second frame is recognizable by the first wireless communication method but is not recognizable by the second wireless communication method.
摘要:
A wireless communication apparatus includes a transmission section and a control section. The transmission section transmits data using wireless communication. The control section controls a transmission rate for the transmission section. The control section limits data size of data to be transmitted to at most a prescribed value and requests a transmission acknowledgement, during a period from immediately after a change in the transmission rate until number of times that the transmission section transmits data reaches a prescribed number of times.
摘要:
A radio communication system includes one master station which performs transmission without being controlled by another radio station and which is configured to independently set a channel for use in a radio communication, and at least one slave station which belongs to the one master station and whose radio communication channel used and transmission/reception operations are controlled by the master station. When detecting an interference signal which disturbs the radio communication during operation, the one master station or the at least one slave station sets a first modulation scheme applied to the radio communication to the same second modulation scheme as a modulation scheme used in broadcast in order to convey information necessary for an evasive action to move to another radio communication channel.
摘要:
A communication method includes causing a transmitter to apply error correcting or detecting code systems to multiple frames or packets and to transmit the multiple frames or packets in succession, causing a receiver to receive the transmitted frames or packets and to decode each of the frames or packets received, and causing the receiver to send an acknowledgment signal to the transmitter on the basis of the results of decoding of the frames or packets. The transmitter applies two or more error correcting or detecting code systems to the frames or packets.
摘要:
According to one embodiment, a wireless communication device includes a first transmitting/receiving unit, a first physical processor, and a first MAC processor. The first transmitting/receiving unit transmits one first wireless signal and receives a second wireless signal by a first wireless communication method using a frequency band with a certain bandwidth. The first physical processor decodes the second wireless signal to obtain a frame and encodes a frame of the first wireless signal to be transmitted. The first MAC processor supplies a control frame generated by embedding a first frame to a MAC header of a second frame to the physical processor as the frame. The first frame is recognizable by the first wireless communication method and a second wireless communication method. The second frame is recognizable by the first wireless communication method but is not recognizable by the second wireless communication method.
摘要:
A communication method includes causing a transmitter to apply error correcting or detecting code systems to multiple frames or packets and to transmit the multiple frames or packets in succession, causing a receiver to receive the transmitted frames or packets and to decode each of the frames or packets received, and causing the receiver to send an acknowledgment signal to the transmitter on the basis of the results of decoding of the frames or packets. The transmitter applies two or more error correcting or detecting code systems to the frames or packets.
摘要:
When a wireless communication apparatus transmits a data frame requesting an ACK frame, it is expected that a receiver station will transmit the ACK frame. A preamble analyzer analyzes whether or not a preamble pattern added to the header of a received frame exists from the time it is expected that the ACK frame will be received. When a desired preamble pattern is detected, the preamble analyzer supplies instructions to start an operation of demodulating a reception signal to a demodulator via a controller.
摘要:
A header analysis unit reads a parameter showing a format of a digital signal contained in a received signal. A received signal quality measurement unit measures a quality of the received signal. An awake/sleep control unit controls restart and sleep of a reception unit based on data from the header analysis unit and the received signal quality measurement unit. The awake/sleep control unit stops a reception operation for a period corresponding to a frame length when the quality of the leading portion of the received signal is less than a predetermined threshold.
摘要:
A wireless communication apparatus includes a reception unit, an information management unit, and a transmission unit. The reception unit receives data including a plurality of data frames. The data frames are transmitted from an identical data source and managed by an identical traffic identifier. The information management unit retains acknowledgement information to perform an acknowledgement. The information management unit discards an already-retaining acknowledgement information when the data is newly received. The transmission unit performs the acknowledgement to the data source of the data using the acknowledgement information. The transmission unit performs the acknowledgement to the data corresponding to the acknowledgement information irrespective of a request of the acknowledgement from the data source when the information management unit discards the acknowledgement information or when a prediction on the discard of the acknowledgement information is made.